new to javascript. i have these two arrays how can i find the matching values? tried below but returns empty array probably because it’s for normal array structure [”, ”, ”] Matching value should be [‘2’] Answer You can simply use .flat() to flatten the arrays so you only d…
Tag: arrays
Generate an array of years with duplicates of each year + labeled season
How do i dynamically generate an array of years starting from 2004 till the current year, with each year labeled with “Spring” and “Fall” like in the attached picture? Thank you! Answer You can easily achieve this result using flatMap. If you don’t care about the current yearR…
Compare array of object values if equals add it total
I have an array structure as above in my app whenever user clicks make pizza or another recipe it adding recipe informations to new menu state given below. After that i need to compare that menu array’s ingName and unit fields to calculate total ingredient need for ex. according to above array total is …
Cannot Read Property “toString” of Undefined – Javascript [closed]
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. Closed 1 y…
How to add array to a specific object in a data?
Here how I’m trying to add some values to my data. The problem is that the tasks add as an object in the same level as parent’s object. Like this: However, I need it to be inside an object. Answer The listName looks to be the top level property, so use that to add another level:
I cant look for a value in a object array, it returns me error [closed]
Closed. This question is not reproducible or was caused by typos. It is not currently accepting answers. This question was caused by a typo or a problem that can no longer be reproduced. While similar questions may be on-topic here, this one was resolved in a way less likely to help future readers. Closed 1 y…
How to group ID’s for duplicate object and remove object in array using javascript
I want to remove duplicate object from array after grouping duplicate object id from matched(already existing) object id. Whatever i have tried that’s grouping ID’s but not getting how to remove duplicate object from array. Original Array Expected Array Tried Please help to achieve expected result…
Mixed let/const array destructuring from split string
TS throws an error: When trying to deconstruct this array, after a string split: Hours and minutes should be declared as constants, but Seconds and Millis may change, thus should be declared as let. This can be fixed in many approaches, but I can’t find a beautiful way of doing this. Any ideas? Answer Y…
Generate unique combinations in JavaScript from n objects with r samples
What is the best way to generate all unique combinations in JavaScript from N objects with R samples. For example: Expected result I am able to achieve above using recursive solution. But it is slow for large datasets (e.g. N=25, R=10). Is there any faster way to achieve this? Answer Ok, here a straight imple…
How can I join different variables into one array?
I am trying to an array that look like this : let whatever= [“one,”two”,”three”,”four”,”five”] out of the divs below. How can it be done ? I’ve tried Array.form() / tried a few things with random.innerText . Nothing seems to work Answer This should d…